Simple Lithophane Box

This lithophane box has 3mm walls. All you have to do is take your measurements of your printed photo and add 6mm to the height and width of the photo. You can adjust the depth as needed. Should be easy enough to do in any slicer. I used hue due drop lights to light the box. Images i posted have rounded corners. The file itself does not. If need be comment and I will upload it. Enjoy!